Post on 23-Dec-2015
MITOSIS AND ASEXUAL REPRODUCTION
MITOSIS AND ASEXUAL REPRODUCTION
WHAT ARE ALL THE LIFE PROCESSES?› H.N.T.R.S.G.E.R.M.R
WHICH ONES HAVE WE COVERED?› H.N.T.R.S.G.E.R.M
WHAT’S LEFT?› R REPRODUCTION!!
WHAT IS REPRODUCTION?
MITOSIS AND ASEXUAL REPRODUCTION
REPRODUCTION› THE PROCESS BY WHICH LIVING THINGS
PRODUCE NEW ORGANISMS OF THEIR OWN KIND
MITOSIS AND ASEXUAL REPRODUCTION
HOW DOES REPRODUCTION WORK?› REMEMBER:
ALL CELLS ARISE FROM PRE-EXISTING CELLS
› THE PROCESS BY WHICH CELLS MAKE MORE CELLS IS CALLED…
›CELL DIVISION
MITOSIS AND ASEXUAL REPRODUCTION
CELL DIVISION CAN BE BROKEN INTO TWO CATEGORIES› MITOTIC CELL DIVISION EXACT COPIES
ARE MADE› MEIOTIC CELL DIVISION NOT EXACT
COPIES ARE MADE *WE WILL DISCUSS THIS ONE FURTHER NEXT
CHAPTER*
MITOSIS AND ASEXUAL REPRODUCTION
MITOTIC CELL DIVISON› CLICK THE PIC
FOR THECELL DIVISIONSONG
MITOSIS AND ASEXUAL REPRODUCTION
MITOTIC CELL DIVISION› A.K.A. ASEXUAL REPRODUCTION
REPRODUCTION WITHOUT SEX (REQUIRING ONLY ONE PARENT CELL)
› BROKEN INTO TWO PROCESSES MITOSIS CYTOKINESIS
MITOSIS AND ASEXUAL REPRODUCTION
MITOSIS
MITOSIS AND ASEXUAL REPRODUCTION
MITOSIS› THE CONTENTS OF THE
NUCLEUS ARE COPIEDAND THEN DIVIDED TO FORM TWO IDENTICALNUCLEI
› WHY IS THIS SO IMPORTANT? IN OTHER WORDS, WHY DOES THIS NEED TO HAPPEN?(*HINT – WHAT’S IN THE NUCLEUS?)
MITOSIS AND ASEXUAL REPRODUCTION
MITOSIS› LET’S BREAK
DOWN THESTAGES OFMITOSIS
› CLICK THEIMAGE FOR AVIDEO
MITOSIS AND ASEXUAL REPRODUCTION
CYTOKINESIS› THE CYTOPLASM (CELL) DIVIDES IN TWO
MITOSIS AND ASEXUAL REPRODUCTION
CYTOKINESIS› IN ANIMAL CELLS
CLEAVAGE FURROW› IN PLANT CELLS
CELL PLATE FORMATION WHY IS THERE A DIFFERENCE WITH
CYTOKINESIS AND NOT WITH MITOSIS?
MITOSIS AND ASEXUAL REPRODUCTION
SHOULD MITOTIC CELL DIVISION HAPPEN ALL THE TIME? WHY OR WHY NOT?
SHOULD MITOTIC CELL DIVISION HAPPEN AT THE SAME RATE ALL THE TIME? WHY OR WHY NOT?
WHAT DO WE CALL MECHANISMS THAT CAN CHANGE THE RATE OF A REACTION?(*HINT WHAT CONTROLS INSULIN PRODUCTION?
MITOSIS AND ASEXUAL REPRODUCTION
WHAT’S A CONSEQUENCE OF MITOTIC CELL DIVISION HAPPENING UNCONTROLLABLY?
CANCER
MITOSIS AND ASEXUAL REPRODUCTION
DON’T WORRY…NORMALLY A SPECIAL PROTEIN CALLED CYCLIN EXISTS THAT CONTROLS WHEN CELLS DIVIDE, SO THE “C” WORD IS KEPT IN CHECK
MITOSIS AND ASEXUAL REPRODUCTION
MITOTIC CELL DIVISION AS A FORM OF REPRODUCTION› ASEXUAL ONLY› PRODUCES “IDENTICAL” OFFSPRING
FORMS OF ASEXUAL REPRODUCTION› BINARY FISSION› BUDDING› SPORE FORMATION› REGENERATION› VEGETATIVE REPRODUCTION (PROPAGATION)
MITOSIS AND ASEXUAL REPRODUCTION
BINARY FISSION
BUDDING
SPORE FORMATION
REGENERATION
VEGETATIVE PROPAGATION
MITOSIS AND ASEXUAL REPRODUCTION
THAT’S MITOTIC CELL DIVISION…BUT WHAT IF YOU DON’T WANT AN “IDENTICAL” OFFSPRING?
PRESENTING MEIOTIC CELL DIVISION…COMING NEXT CHAPTER